Cooler



FIG. 1 is an isometric view from the front of a cooler incorporating the design, wherein a dot patttern shading exterior portions represents a translucent material having a first color and an x pattern shading interior portions represents a material having a second color;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a left-side view thereof;

FIG. 5 is a right-side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is bottom view thereof. 

The ornamental design for a cooler, substantially as shown and described. 